Crown Audio IQ-MCA-IQ-MC8 - Manual (Page 23)

Page 23 Reference Manual
IQ-MC Modules
6 Specifications
General
Internal Controls: An 8-segment DIP
switch sets the IQ address (decimal
range: 1–250)*. A Reset/Preset switch,
accessible with a straightened paper
clip through the module’s front panel,
selects the next user preset if pressed
for less than 2 seconds, resets set-
tings to “factory default ” if it is
pressed for more than 2 seconds, or
re-writes from firmware to flash
memory restoring all settings to fac-
tory default if it is pressed while apply-
ing power. Jumpers select thru or
processed signal for daisy output of
each channel.
Connectors: IQ Bus: RJ-45 con-
nector for input, RJ-45 connector for
daisy output. AUX In/Aux Out/Listen
Bus: RJ-11 connector.
Indicators: A yellow DATA indicator
flashes when a valid IQ command is
received from the IQ System via the
IQ Bus. The DATA indicator can be
forced on to facilitate rapid trouble-
shooting of IQ Bus wiring. A green
PRESET indicator flashes to indi-
cate the user preset number cur-
rently selected in memory. If the
PRESET indicator does not flash the
preset number when selected, this
indicates the preset has been modi-
fied by the user.
Memory Backup: 8 Kbyte EEPROM
for backup of run-time parameters,
presets, and program storage. Ca-
pable of 80,000 writes minimum.
* If address “0” is selected, the MC-IQ will
operate in stand-alone mode. In this
mode, the Crown bus port is deactivated.
IQ Bus Data Communication
Protection: If communication is lost,
the unit will continue to function with
the last commands received.
Data Rate: 38.4 K BAUD.
Data Format: Serial, binary, asyn-
chronous; 1 start bit; 1 stop bit; 8 data
bits; no parity.
IQ Bus Interface Type: Optically
isolated 20 milliamp serial loop.
Operation: Half duplex.
Transmission Distance: Variable
from 200 to 3000 feet (61 to 914 m),
depending upon wire capacitance.
Typically 1000 feet (305 M) using
shielded twisted-pair wire, #26 AWG
or larger. Can be extended with an
IQ Repeater.
Audio
Please note: The audio specifications
are referenced to 0.775 V (0 dBu). Mea-
surements were made at the output of
the IQ-MC module, itself.
Maximum Input Level: +20 dBu.
Dynamic Range: >100 dB (A-
weighted, 20 Hz to 20 kHz).
Frequency Response: ±0.5 dB
from 20 Hz to 20 kHz.
Common Mode Rejection (CMR):
50 dB (typical).
Total Harmonic Distortion + Noise
(THD+N): <0.05% (1 kHz, 0dBu).
Maximum Output Level: +20 dBu.
IQ System Data Acquisition
Multi-Channel, 14-bit Analog to
Digital Converter.
Input/Output Monitor Accuracy:
Typically ±1 dB.